Stability of diatomaceous silica and its geochemical implication |
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| Authors: | Huanxin Weng Zhongyue Shen Mingyong Yuan Defang Guo Jianyu Chen |
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| Institution: | WENG Huanxin, SHEN Zhongyue, YUAN Mingyong, GUO Defang and CHEN Jianyu
Department of Earth Sciences, Zhejiang University, Hangzhou 310027, China;
The Center of Analysis and Measurement, Zhejiang University, Hangzhou 310027, China |
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| Abstract: | An experiment of stability of diatomaceous silica was performed. The results show that pH value and temperature dominantly influence the stability. The pH value concerning largely dissolving diatomaceous silica is 2-3 higher than that amorphous silica due to the buffer action of coexistent clay minerals. The solubility of diatomaceous silica rises distinctly when temperature is over 40℃, which suggests the cause of distribution of large-scale diatomite deposits in the middle to high latitude areas over the world. There is no close relationship between the solubility of diatomaceous silica and time, which shows that the content of diatomaceous silica in diatomite deposits are determined by the latest environment condition since they formed and bore no relation to the time they experienced. |
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| Keywords: | diatomaceous silica solubility diatomite |
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